26. The way _______ the scientist solved the problem was different from what the other scientists were used to.
On approaching the school you will find in the middle of our school _______.
Now that spring is here, you can ______ these fur coats till you need them again next winter.
Up to now, the program ______ thousands of children who would otherwise have died.
Mark needs to learn Chinese ______ his company is opening a branch in Beijing.
Paper money was in ____ use in China when Marco Polo visited the country in ____ thirteenth century.